Improvement in plenum and vacuum pumps



UNITED STATES DANIEL L. CAMERON, OF MADISON STATION, MISSISSIPPI.

IMPROVEMENT IN PLENUM AND VACUUM PUMPS.

Specification forming part of Letters Patent No. 157,191, dated November24, 1874; application ilcd July 18, 1874.

To all whom it may concern:

Beit known that I, DANIEL L. CAMERON, of Madison Station, in the countyof Madison and State of Mississippi, have invented a new and ImprovedPlenum and Vacuum Apparatus, of whichthe following is a specification:

rIhis invention relates to certain improvements in plenum and vacuumapparatus; and consists in the particular construction and arrangementof parts, as will iirst be fully described, and then pointed out in theclaim.

Figure lis partly a' side elevation and partly a longitudinal sectionalelevation of my improved apparatus. Fig. 2 is a transverse section.

Similar letters of reference indicate corresponding parts.

A represents a hollow tube; B, a coiled tube; O, hollow supports forshafts or pipes, such as may be used if the apparatus is to be employedfor pumping` water. D represents an inlet-valve at each end of theshaft, to receive the water from pipe C. E represents exhaust valves,near each end, exhausting into the air. The shaft is partitioned betweenthe ends, so as to cut off communication through it from one end of thecoiled tube to the other. F represents a portion of the coil filled withmercury as high as the arms of the shaft, which should be equal to orgreater than twenty-eight inches, in Order to overbalance atmosphericpressure.

It will be seen that, by turning the coil in the direction indicated bythe arrows, .the mercury, flowing along the tube from one end to theother, will create a vacuum in the side and plenum on the other side,and will draw air or water through valve D at one end of the hollowyshaft, and expel it at the other end through valve If the motion bereversed when the mercury has traversed the length of the coiled tube B,the suction will open valve l) and close valve E at the other end, andclose valve D and open valve E of the lirst end, thus producingcontinuous suction from the well or cistern and continuous exhaust. Ifthe inlet-valves be arranged at E, and eX- Vhaust-valves at D, theapparatus may be used for anair-compressor, of which the tubes C may bethe conductor to the reservoir.

I know that mercurial pumps have been constructed in the form of awheel, and operated on the same broad principle as shown in myinvention. I disclaim any broadness of invention therefor, and confinemyself to my particular devices, as embodied in the claim.

Having thus described 1n yin vention, I claim as new and desire tosecure by Letters Patent- The apparatus consisting essentially of thehollow partitioned shaft A, coiled tube B, mercury F, channels C C,inlet-valves D, and outlet-valves E, all constructed and arrangedsubstantially as Vand for the purpose described. DANIEL L. CAMERON.Witnesses:

J. O. CALLAGHAN, D. P. MONTGOMERY.

